Which is the best mattress to sleep on?

Q: Which is the best mattress to sleep on? Is a spring mattress good? I have to make a decision very soon it is for my mother who has Acute lower back pain due to age.

A:A spring mattress is not the answer. I would suggest a 2 inch thick cotton mattress which should be changed every year. The problem arises because pressure points build up and they in turn hurt the already tender spine and this is what necessitates the change every year.